It's hard to know how polite a preschooler should actually be. After all, it seems like typical little-kid behavior to jump up from the dinner table the second she's gobbled down her nuggets. Or to forget to say thanks when a family friend comes over and brings her an unexpected present."While it's normal for preschoolers to still be self-centered, teaching manners reminds them that other people in the world matter and deserve respect," says Kathy Hirsh-Pasek, Ph.D., professor of psychology at Temple University, in Philadelphia. Fortunately, this is a great age to teach social graces because your child is naturally eager to please you. To develop his sense of decorum, start working on these habits now.Best Behavior: Be KindIn preschool and on the playground, taking turns, sharing, and being friendly to other kids is the law of the land.Make it Happen: Point out other people exhibiting the behaviors you'd like to see in your kid, says Jodi Stoner, Ph.D., a clinical psychotherapist and coauthor of Good Manners Are Contagious. If you make your child aware of others doing sweet deeds, he'll begin to identify with the actions you're showing him.Kids this age are still possessive, so encouraging your child to share may be difficult. It can take time for him to understand that he may feel uncomfortable while someone else plays with his toy, so be sympathetic. And be enthusiastic when your kid offers a toy to someone or gives her a turn on his scooter. Your child may care more about getting praise from you than about the toy anyway.Parents magazine.

Best Behavior: Say Please and Thank You

​Using "magic words" may seem like just a fun routine to your child, but these niceties make other people feel good.Make it Happen: Be a role model. "Kids love to imitate Mom and Dad," says Roberta Golinkoff, Ph.D., professor in the School of Education at the University of Delaware in Newark. But she'll learn to use please and thank you in everyday conversations even faster when you praise her and react quickly to her polite requests and responses. If she forgets, just give her a little reminder.

Best Behavior: Don't InterruptYou're on the phone with a friend and you feel a tug on your free hand that's so forceful, you're sure it's King Kong on the other end. As you know, when your child wants attention, he often insists on having it right now. But your child is old enough to be patient and occupy himself for a brief period of time, and it's fine to have him wait.Make it Happen: Explain that when you're talking to someone else, it's not okay to interrupt unless it's critical (someone is hurt or he has to go to the potty immediately). For any other less-important intrusions, firmly tell him, "Mommy is on the phone. Play with your blocks while I finish talking and I'll be right there." Then follow through when you're done with the call by thanking him for being patient and giving him your undivided attention.

Best Behavior: Greet NicelyAlthough kids often hide their eyes from strangers, saying hi and goodbye -- and answering a simple question -- are essential social graces.Make it Happen: Rather than merely coaxing a dutiful hello from your child, challenge her to tell you some detail about the person too, suggests Judi Vankevich, a children's entertainer and recording artist better known as Judi The Manners Lady. You might say, "Can you see what color Mrs. Johnson's eyes are?" This will help her learn to look adults in the eye.Once your child has mastered a proper "hello," move on to a handshake. Start by teaching her the difference between a weak "dead-fish" handshake and a nice, firm one, says Vankevich. Then practice introductions at home -- perhaps by pretending to be different characters or friends.

Best Behavior: Eat at the TableStaying in his seat for more than a few minutes (especially with no television or toys) can be tough for any kid. But most 3-year-olds should be able to sit at the table for about 15 minutes, says Dr. Stoner. If that seems like a challenge, aim for ten and work your way up. It's important for your child to realize that dinnertime is family time.Make it Happen: Set up a consistent routine that cuts down on distractions and conflicts. A few tips: Avoid any juice or snacks right before mealtime to ensure that your child is hungry; insist that food be eaten only at the table; let him help set the table each night, and consider giving him a sticker as a reward when he does well. Family meals are also an opportunity to model other table manners, Dr. Stoner adds. Keep your cell phone off the table. Put your napkin in your lap, and chew with your mouth closed. It may take a while to change old habits, but imagine all the civilized meals in your future.Originally published in the August 2010 issue of Parents Magazine